Went up north to find snow with my oldest. Along the Superior Hiking Trail.

Coyote in the Minnesota River Valley Nature Preserve

Join The National Academies of Sciences, Engineering and Medicine for a hybrid workshop on January 13-14, 2026 that will look at AI innovations that could enhance climate science and support decision-making for resilience and mitigation: https://ow.ly/QqoZ50XHxSs

Morning clouds

Here’s a real time view of the solstice from the GOES-West geostationary weather satellite. Also shows the atmospheric river stRting to impact CA. slider.cira.colostate.edu?sat=goes-18&...

@erthsarah.bsky.social This reminds me of Carleton's geothermal heat pump (though this uses wastewater instead of groundwater) Maybe point other universities to this as a model, if they don't think they could build well fields. www.cpr.org/2025/12/20/h...

Y'all, I just got out of the NSF-BIO webinar where they explained changes to peer review. It's not good. 🧪 scienceforeveryone.science/changes-to-n...

If there ever were a time to legislate for local benefits & transparency on environmental costs… www.brookings.edu/articles/rur...

Truly enjoyed meeting with our sustainability & facilities team & the consultant who reviews campus buildings to support capital planning & sustainability. Carleton has a lot to be proud of & I get to ask questions like, “do colleges ever add new categories to their public emissions tracking?”

Devastating and dangerous blow to the weather and climate community tonight, as 20,000 earth and space scientists meet at #AGU25. New @ucs.org statement from @carlonimbus.bsky.social on the Trump administration plans to dismantle @ncar-ucar.bsky.social: www.ucs.org/about/news/t...

On FB, Yukon Geological Survey posted some spectacular photos of landslides & snow avalanches triggered by the magnitude 7.0 earthquake on Dec 6 in the St Elias Mountains. Here are some of my favs. @geocron.bsky.social @theronfinley.bsky.social @davepetley.bsky.social @ksvenenvig.bsky.social 🧪⚒️

Research leadership, sifting through our fingers. I imagine the great rebuilding, because sitting with the present doesn’t work. www.washingtonpost.com/climate-envi...

The end of the merit review system that set the standard for everyone else trying to set up merit review systems.

Feeling philosophical on a Friday? Part review, part commentary - my first paper in a LONG while asking what happens to glaciers as they retreat, how we talk about it, and why we care. Out now in @igsoc.bsky.social special collection on Vanishing Glaciers. www.cambridge.org/core/journal...

I love this study 🧪, because I really think people are in general more empathic than we give them credit for! news.stanford.edu/stories/2025...

More than half of all majors offered were represented in an intensive sustainability across the curriculum workshop yesterday @carleton.edu. What AMAZING educators & new connections to campus and community teaching opportunities.

Three objects spotted by James Webb Space Telescope may be dark stars: massive, luminous and powered by dark matter annihilation. If confirmed, they could reshape theories of early star formation 🧪 🔭 ⭐https://buff.ly/yWd1ZTp

Field photo Friday. Polar Bear on sea ice in northern Chuckchi Sea/southern Arctic Ocean (I can’t remember exactly where). Photo taken from USCGC Polar Sea on AWS ‘98 cruise. 🧪⚒️🥼❄️🌊

Here is what happens to grids we don’t have policy & utility incentives for the upgrades we need. In my community & many homeowners/small businesses can’t support renewables until we have grid upgrades. The red areas are no go for “hosting”. www.xcelenergy.com/hosting_capa...

Oof, I feel this one, I’ve seen this more than a dozen times, it was the first glacier I stood on. www.ktoo.org/2025/11/25/m...

The adaptation gap amplified by aging infrastructure. yaleclimateconnections.org/2025/11/u-s-...

Know this about me, President Trump: I love our Constitution and I will never give up the ship. 🇺🇸

Between the paid disinformation & a government that alters health recommendations without evidence, polarization grows & the sad consequences… time.com/7334826/repu...

Extreme heat has extreme consequences www.nature.com/articles/s41...

Community science project monitoring PFAS in our state, in pine needles! www.pca.state.mn.us/news-and-sto...

Devastating everywhere, especially at home. Adrian’s kids witnessed this & guns were pointed a children. We certainly don’t gain anything from this horror. sahanjournal.com/immigration/...

🧭⚙️Climate attribution science plays a central role in climate litigation and policy-making. The science is central to legal debates on the causal links between human activities, global climate change, and impacts on human and natural systems.📚🌡️🌪️ 🔗Climate Attribution Database:

“Create a wave of truth” news.un.org/en/story/202...

I know the sky last night was a big deal. Mornings are also special! @carleton.edu arboretum

Pausing before I attempt grass…

Those of us who worked with USAID and in global health more broadly warned of this- shouting, screaming into the void. The administration- at every level- understood this would happen. It’s unconscionable.

Just now in front of McMurdo Station. Very rare to see Emperor's come right up to the front of McMurdo Station, especially so early in the summer. #scicomm 🧪

Great episode & colleague Eric Klemetti is also featured. My philosophy colleague & I were just talking about fear & humor as plot devices.

Please share! CIRES is accepting applications for the role of Associate Director of Science to oversee research activities! This position supervises others and reports to the CIRES Director. Learn more about the position: buff.ly/DE3DhQH

Higher ed has a responsibility to the public & supporting students in learning & addressing needs of the community. Thank you @alisonbyerly.bsky.social www.startribune.com/federal-gove...

Absolutely amazing. For context the oldest continuous records are around a million years old.

As the DOE touts lies. Every dollar withheld from modernizing our energy system is a gift to our economic rivals. washingtonmonthly.com/2025/10/15/t...

Writing is my coping mechanism when I am worried about a weather situation. As an unprecedented storm like #HurricaneMelissa approaches Jamaica, I feel helpless, so I write. My Tuesday morning thoughts on the storm. www.forbes.com/sites/marsha... --

Absolutely shocking cuts to graduate school. One example. “At Harvard, the cuts included a 75 percent reduction in Ph.D. seats in the Science division and a 60 percent reduction in the Arts & Humanities division over the next two years.” share.google/dYDqxUqozDYV...

Very sad. The DOI files to cut more than. 2000 jobs. Federal science is important to environmental economics, our health, & ecological protection. Cutting work to understand & support big important areas of management is harmful. thehill.com/policy/energ...

I'm proud to help lead the United Nations' #COP30 Local Leaders Forum next month in Brazil. Regional leaders — from mayors to governors — are uniquely able to turn ambitious plans to tackle the climate crisis into reality at the local level. California is all-hands-on-deck in this fight.

How far would you travel for a cause? Geographer & environmental educator Leandro Costa is biking 3,500 kilometers to COP30, with the mission of educating and listening to children, teenagers, and adults about the impacts of climate change. Learn about his journey: buff.ly/bUdeJ45 & buff.ly/RvDAiJ9

Very fun to talk water & climate with international rotary students & @carleton.edu students. Common interests included fishing, recreation, and gathering. We’re supporting engagement aligned with goals in our community to remove the dam & support a proactive response. Engagement matters!

I’m in front of the interdisciplinary science complex @carleton.edu getting ready for 24 people in AASHE’s decarbonization academy to learn about our systems approach to decarbonization & tour the East Energy Station, the brain of the district geothermal system w Linda Weingarten, AVP of facilities

On campus been working with our food service provider to understand new categories of emissions, from those we have long measured. Beef is such a big slice of food emissions. It’s been satisfying scale solution through networks (of the food provider) while students think about campus.

Reinforcing feedback loop: “fewer graduate students mean less science will be produced”, says Donna Ginther, an economist...”If this persists for a number of years, the scientific workforce will shrink.” Fewer scientists overall will mean fewer scientific discoveries. www.nature.com/articles/d41...

I love local government processes & actions. Tonight our city is formally endorsing passenger rail proposed in Minnesota. Next month council votes on the purchase of a dam from Post to support its removal. These are big sustainability & justice issues & related to outcomes on campus & community.

Excited to have @alexrbarron.bsky.social on campus tomorrow. Making progress means we must keep having important conversations about climate action in higher ed & using evidence-based approaches.

A lot of comments on Mars rovers or Moon landings, but it's important to remember that the planet NASA studies most is Earth. This is less about cutting flashy things like moonwalks and more about keeping communities in the dark on climate, weather, agriculture, pollution, natural hazards, and more.